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Pam 438 P.9001 speed adjustment

Johnnyboy0

Horology Curious
5/2/22
23
6
3
Hi, I have a Pam 438 P.9001 movement that's running about 3 mins slow a day.
I have tried searching to confirm what lever is for adjusting the speed but with no luck.
There seems to be two levers but I'm not sure which one, I dont know how to upload a photo here to show either.
If anyone can help. Thanks.